Improvement in stop-valves



N diritti states sind @ittica JOHN PATERSON, OF TROY, NEW YORK.

Laim Para; ivo. 95,260, mal satema 2s, 1869.

IMPRovEMEivT 1N eroe-VALVES.

The `Schedule referred to in these Letters Patent and making part of the'same.

To all whom 'it mag/ .confcefm:

Be it known that I, JOHN PA'rnRsoN, of Troy, in the county of Rensselaer, and State of lT ew York,

have invented a new and ,useful Improvement in Stop- Valves; and Ido hereby declare that the vfollowing is a full, clear, and exact'` description thereof', which will enable others skilled inthe art to make anduse the same, reference being had to the accompanying drawings, forming part of this specification.

` The object of this invention` is to provide new and useful improvements in the construction of stop-valves fox-steam, water,` and other pipes.

The invention comprises apair of sliding gates,sus. pended from a stem, working up and down in a chamber atv `the. ends of the two pipeconnections, and a cam screw, or inclined plan e,arranged between the said gates, by 'which'whenfthey have arrived at theirv seats on` the ends of thel said pipes, they are pressed .down 'tightly thereon, and which releases the said pressure as soon as the valve-stem is raised a small amount in thedirection for opening the gates.

It also comprises an improved construction of the' "gates or valves, intended .to `strengthen 'the same, as

` vex form, and have stems l) projecting inward from the convex backs and rimsv E on .the other side, iitted truly to the ends of the connections B.

The inner end s of these stems have cam-faces, or inclined planes or wedges, andare fitted to work against reversely-operating dam-faucets, on an oscilla-A ting block, F, supported between the stems of each valve on trunnions `C, which `enter sockets or holes formed in the ends of the block F, and having an arm, H, projecting laterally tooneside of the chamber, to

'be arrested by a stop, I, thereon, at the proper time when the valves are being closed, so as to oscillate the said block F,and force the valves against their seats. 1

Instead of these cams or inclined planes, the stems at4 the rear of thelvalvesvmay be screwed externally or internally, andthe oscillating block F may be cor-` respondingly' fitted thereto. i

The Vvalves are suspended from a screwed sleeve or nut, K, on thestenrL, for raising or lowering thenn in a manner to admit them to move laterally.`

'llie means of suspension consist` of two pins, a,

Vwhich project from opposite sides of the sleeve K, at

right angles to the same, and enter the cylindrical socket-stems l formed on the upper portion of the valves.

rlhe stem L scs up through a stnihng-box, M,

where it is confined bya collar against end movement.

'It moves the valves up or down by screwing the nut K in either direction.

To admit of raising the block E upward, it is provided with a hole through it, coincident with the screw, for the latter to pass `through, `and to permit of turningthe said block, the said hole is made larger than the stem L.V

It is not, however, intended that the stem L shall be of suicient length to reach the ,block F, (while the same is being raised,). until the arm H shall have been raised oli" its stop or rest, and hence the cam-faces oi' the block relieved from pressure. Other means o'i' raising aiid'lowerng the valves may be employed.'

The form of these valves is suchas to require but little tting on the faces, and tu give them great .strength to sustain the lateral pressure of the camblock F; and to further strengthen them, the concavo-convexparts are corrugated, or provided with radiating strengthening-.ribs N.

-lt will be seen that as soon as the valve-stem is raised,`the pressure of the valves or gates on their seats is released, and they are-free to be raised up or moved downA again without other resistance than -their weight.

Having thus described my invention,

What I claim as new', and desire to secure by Let-y ters Patent, is

l. A cam-block, adapted to be oscillated by an arni or lever, and arranged in combination with valves having cam-projections on their backs, substantially' as specified.

2. The combination of the valves C and socketsb` with pins a and sleeve'K, substantially as set forth `and shown.

3, The combination of the valves G, cam-stems D, block F, arm H, pins a, sockets b, sleeve K, and stem L, when constructed andl arranged substantially as set forth and shown.

v JOHN PATERSON.

Witnesses:

Gno. W. Manen, ALEX. F. ROBERTS. 

